Parity data in solid state memory

摘要

A circuit may be configured to increase the data retention reliability of non-volatile solid state memory (NVSSM) by writing a parity block, which can contain user data pages and parity data pages. A circuit can also be configured to store the parity data pages based on whether the user data pages in the block have been filled, on elapsed time, or during a power down event.

主权项

1. An apparatus comprising:
a circuit configured to:
receive host data at a device including a nonvolatile solid state memory;store user data to the nonvolatile solid state memory in a parity block including multiple user data pages and a parity data page;generate parity data based on the multiple user data pages; anddetermine if the parity data should be written to the parity page when the user data pages are not substantially full based on at least one of reception of a power down command from a host and expiration of a timer associated with a non-powered storage lifespan of a storage associated with the device.